Four-legged robots combine mobile perception with joint control to move over uneven ground. Inspection platforms, research robots and wheeled quadrupeds share much of their component stack, with different demands on payload, weather protection and sustained operation.
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Each MEVIUS2 leg has a lateral hip joint, a forward-swing hip joint and a knee. Motors, reduction gears, bearings and encoders turn electrical power into controlled leg motion.
A parallel linkage transfers knee motion while keeping actuator mass nearer the body. The foot supplies a compliant contact surface.
The rear legs use the same three-joint arrangement. Coordinated joint torque supports the body and shifts contact between feet. The gait depends on control and feedback as well as the mechanism.
Foot impacts travel through the links and joint supports into the body. Motor heating, transmission loads and contact grip limit sustained motion.
The body carries the battery, control electronics and perception hardware. MEVIUS2 uses two Livox MID-360 LiDARs and a TIER IV C1 camera. Their observations support localisation and navigation.
Its aluminium structure combines machined A7075 parts with A5052 sheet fabrication. Cameras, LiDAR, computing and power remain distinct component layers.
MEVIUS2 is a research design published in March 2026. The display uses its original meshes and joint frames. It is one architecture, alongside commercial robots with different transmissions, sensors and enclosure designs.
MEVIUS2 paper · Model provenance · MIT licence~35,000
Quadrupeds shipped in H1 2026, estimated by Counterpoint. Industrial applications accounted for 40%.
Counterpoint forecasts 90,000+ shipments and US$1.5bn industry revenue for full-year 2026, including supporting hardware and software. These are forecasts.
The shipment estimate excludes small entry-level robots designed exclusively as children’s companions.
Counterpoint Research · 21 Sep 2026Overall quadruped shipments. Other vendors is the calculated remainder after the three named shares. AGIQUAD leads industrial shipments; Genisom’s M series exceeded 1,000 shipments in the period.
Counterpoint Research · 21 Sep 2026IDC separately estimates more than 49,000 quadrupeds shipped in H1 2026 and over US$400 million in market revenue. Its industry applications contributed over two-thirds of revenue from under 40% of units. These are separate publisher estimates. IDC · H1 2026 →
23,037
quadrupeds sold in 2025
Annual sales rose from 7,136 in 2024.
Unitree’s prospectus records 3,121 quadrupeds sold in 2023, 7,136 in 2024 and 23,037 in 2025. These are annual sales, separate from production counts and Counterpoint’s shipment estimates.
Unitree · IPO prospectus, p. 143 · 31 Jul 202626%
industrial shipment share · H1 2026
Second in Counterpoint’s industrial segment, behind AGIQUAD.
Industrial quadrupeds only; this percentage uses a narrower denominator than the overall shipment chart.
Counterpoint Research · 21 Sep 20262,000+
Spot robots working worldwide
The manufacturer’s implementation guide describes its installed fleet.
Company disclosure on an undated page, checked 6 Oct 2026. Cumulative fleet figure, not annual sales; no fleet measurement date is stated.
Boston Dynamics · implementation guide1,000+
robots shipped
The company also lists 25+ national-security customers and 20+ solution partners.
Company-wide cumulative shipments. The page does not split the count by model or shipment year. Undated disclosure, checked 6 Oct 2026.
Ghost Robotics · company overview50
industrial customers · Sep 2026
The company also reports hundreds of thousands of inspections per month across its autonomous inspection business.
Company-reported customer count, published 9 September 2026. A customer may operate multiple robots; this is not a robot shipment figure.
ANYbotics · 9 Sep 202610,000
Rover X1 assembly order
Lens reports an exclusive complete-machine assembly order from DOBOT, alongside joint motors and structural components.
Order volume disclosed in Lens Technology’s 2025 annual report, published 28 April 2026. The passage does not confirm delivery of all 10,000 units or their final customer sales.
Lens Technology · 2025 annual report, p. 10 · 28 Apr 2026
